A 10,000 term insurance policy for 20 years is issued at age 45.

The net annual premium for the first year is X and for each year thereafter is 2X. Find X in each of the following cases:

(a) M45 - 800, Mes = 520, N^s = 25,000, ^45 = 1200 and A^65 =^ 5500.

(b) A^45 = 25,000, D45 = 1200, / = .03, A^65 = 5500 and Des = 400.